A new adventure with the Master, as told by his jailers, Matheson and Sato. The Vault - an archive of alien artifacts securely stored deep beneath the Angel of the North. There's also a prisoner in the Vault. An extraterrestrial known as the Master. He has been on Earth for some time, but now he's under lock and key. This is his story. Or, as Captain Ruth Matheson and Warrant Officer Charlie Sato discover, perhaps it is theirs. Geoffrey Beevers returns to the role of The Master, which he played opposite Tom Baker's Doctor. Also starring Daphne Ashbrook and Yee Jee Tso as Matheson who first appeared in the Doctor Who TV movie starring Paul McGann.